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MountainPass Performance Comfort Coilovers

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I just sold another set of the Comforts. Which reminds me to ask, what has been the total # sold? Just curious . . .
The number of adjustment clicks would be 14 from full stiff. Beyond 14 there is not going to be any additional softening as the valve is already very open and the limiting factor would be the size of the orifice itself!
So does this twenty clicks also apply to the sport coilover set? And do they have the same Max opening at 14 clicks back from Full stiff? Thanks!
 
I just sold another set of the Comforts. Which reminds me to ask, what has been the total # sold? Just curious . . .

So does this twenty clicks also apply to the sport coilover set? And do they have the same Max opening at 14 clicks back from Full stiff? Thanks!
Haha, I like my job so I am not going to answer the first question.

It applies to all of our adjustable dampers, yes. I had a look at the shock dyno measurements from testing to make sure. Some of the dampers can be adjusted past 14 clicks (that is an engineering question for KW as to why that's possible) but it won't be effective past 14.

- Jesse
 
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Haha, I like my job so I am not going to answer the first question.

It applies to all of our adjustable dampers, yes. I had a look at the shock dyno measurements from testing to make sure. Some of the dampers can be adjusted past 14 clicks (that is an engineering question for KW as to why that's possible) but it won't be effective past 14.

- Jesse
Interesting. I had no idea that that was true. So ballpark if you have the shocks set at like 10 / 8 which means you are a 4/6 clicks from essentially being full soft, what is the relative stiffness and resistance to movement compared with full soft? Obviously. Full soft is still oscillation dampening, don't want you guys to reveal proprietary information but I'm just curious what my seat of the pants impression correlates with in terms of actual resistance to movement between those settings.
 
I have set the compression to 14 all around and the shocks started to make a clunking noise when hitting bumps. Maybe it was due to them shortening too fast, but after I dialed the compression back to 12, the noise went away. This may be the reason why everyone seems to hit at 12 as the magic number to stop at.
 
I have set the compression to 14 all around and the shocks started to make a clunking noise when hitting bumps. Maybe it was due to them shortening too fast, but after I dialed the compression back to 12, the noise went away. This may be the reason why everyone seems to hit at 12 as the magic number to stop at.
Interesting, I haven't experienced the clunking sound at 14 all around, but I'll try to pay better attention next time. Might be because I got these installed when the weather was already around freezing temp, maybe it'll soften up in warmer weather. So are you set at 12 compression and 14 rebound, for both front and rear?
 
Interesting, I haven't experienced the clunking sound at 14 all around, but I'll try to pay better attention next time. Might be because I got these installed when the weather was already around freezing temp, maybe it'll soften up in warmer weather. So are you set at 12 compression and 14 rebound, for both front and rear?
I went with 12/14 all around, then settled on 12/12 all around. Been that way now for many months now, rides fine for me. 12/14 felt a little disconnected, like the car is almost floating-when I hit speed bumps at a certain speed it feels like the car wants to *hop* off the top of the bump.
 
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Does anyone know the spec on the 21mm nut that holds the rear camber arm into the bracket? I think the shop that installed it may not have torqued it to spec...

I noticed my camber being excessive, along with a noise from the rear and found this.
20220108_150543.jpg
 
Does anyone know the spec on the 21mm nut that holds the rear camber arm into the bracket? I think the shop that installed it may not have torqued it to spec...

I noticed my camber being excessive, along with a noise from the rear and found this.
View attachment 753548
You don't have to torque it anywhere near spec to get it to hold. That's somebody who didn't even put the nut on or put it on by hand and never torqued it
 
You may have to replace the bolt too, it might be bent. Get the parts from Tesla, as you might be able to get something of similar size, but not as strong or made for the same amount of stress that part is subject to. I'd hold the shop who installed it accountable for that.
 
You may have to replace the bolt too, it might be bent. Get the parts from Tesla, as you might be able to get something of similar size, but not as strong or made for the same amount of stress that part is subject to. I'd hold the shop who installed it accountable for that.
Very unlikely that the forces applied to that bolt are enough to bend it since it is the lever in a sense the controls camber and the forces applied to that are not huge. Bending it would require tens of thousands of pounds but it is much more likely that the threaded end is partially stripped out/the threads are severely abraded and it may be difficult to get a proper nut on it but that would be easy to determine. It's more likely that the spherical bushing may have sustained enough torque to damage it but even that would require an awful lot of force.
 
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I was pretty happy with the ride of my 2021 MY, but the bumpy roads were definitely bumpy! After reading everything I could find about ride improvements I decided to purchase the MPP Comfort Coilovers. I’m glad I made the upgrade.

I did my own installation in two parts:

  1. I was able to do the rears in my driveway with the car on jack stands. Total time was two hours. 1.5 hours for the first side, and 30 minutes for the second after figuring out exactly what to do the first time around. The rears were pretty easy.
  2. I did the fronts at a DIY auto shop I have access to. There is a spring compressor there and I like that margin of safety when working with these things. The fronts took five hours. Again, 3.5 hours for the first side and 1.5 for the second after learning some lessons.

For the installation, I chose 28mm for the rear perch offset and 60mm for the fronts. I wanted to maintain stock height so I didn’t have to mess with alignment. I was close. The rear currently sits 16.75” from hub to fender, and the front is 16” from hub to center. I’ll be raising the fronts when I get a decent weather day to work on it. I should have gone for 65mm from the start.

A couple tips that others may find useful:

  • Taking things apart was pretty straightforward. I followed the MPP instructions with no issues.
  • When adjusting the perch, make sure you end up with the set screw facing outward for easy adjustment later. I did not realize this, but was able to access it by feel with an Allen wrench.
  • This is a two person job. At least it was for me.
  • I struggled during the reassembly trying to get the assembled damper back into position. The top part of the assembled damper would get hung up on the wheel well cover. One option is to remove this cover before you start. A second option, that I chose, was to remove the lower part of the MPP damper. There is a nipple to guide reassembly. Doing this, I was able to get the upper part caught with the four bolts through the frunk, then wiggle the bottom part until I got it to line up and slide together. Then using a floor jack, I was able to make certain the damper was all the way together before tightening down the bolt that held it together.
  • I did the damper adjustments prior to reassembly. One of my front dampers did not give good feedback to where the settings were. I rotated all the way clockwise, then all the way counterclockwise, then all the way clockwise again. That worked and I could then feel each adjustment point.
  • After reading everything in the “Numbers only” thread (Thanks @Pianewman !) I went with 12/12 on the fronts and 12/10 on the rear. I haven’t driven except for the ride home, but the ride was MUCH improved.
  • MPP Comfort Coils NUMBERS ONLY THREAD

  • After getting everything back together I went for a test ride. I was very pleased to find no squeaks or abnormalities!

I’m riding on the 20” Induction wheels with the OEM Goodyear F1s. I have 12,500 miles on them. When it is time for new tires, I will go with 255/45R20 All Seasons or All Weather (haven’t decided yet) and gain some sidewall to further improve the ride.

Comparing MPP to its competitors, time and time again I read about the great customer service. I was not disappointed!!! Every question I sent was answered quickly, often within an hour. Jesse from MPP responded with exactly the information I needed. I have not seen this level of service in years!

If anyone is thinking about doing this, I highly recommend MPP!
 
A second option, that I chose, was to remove the lower part of the MPP damper. There is a nipple to guide reassembly. Doing this, I was able to get the upper part caught with the four bolts through the frunk, then wiggle the bottom part until I got it to line up and slide together. Then using a floor jack, I was able to make certain the damper was all the way together before tightening down the bolt that held it together.
That is an interesting way to approach that problem. What I did (and probably many do) is remove the entire top piece (four bolts total) and disassemble the shock parts after that assembly is taken out. I never thought about removing the black fork from from the KW shock, as that is what it sounds like you did.

I did all the install at a DIY garage with a spring compressor as well. Times were similar. First sides took a long time, second was basically a do-from-memory affair. That goes with both front and rears, although I do agree, the rears are so much easier.

I would not be in a rush to adjust your shock heights, all the pieces will settle a good 1/4" to 3/4" inches after a week or two. And all four corners may settle differently!

MPP is certainly very fast to respond and knowledgeable. If that alone separates them from the KW suspension, which is very similar, it would be an easy choice to go with MPP.
 
MPP is certainly very fast to respond and knowledgeable. If that alone separates them from the KW suspension, which is very similar, it would be an easy choice to go with MPP.
100% agree. You're always going to get better service from tuning shops than dealing with larger manufacturers. This is what is makes part of the overall value of the kit, rather than shopping for coilovers at the cheapest price.
 
That is an interesting way to approach that problem. What I did (and probably many do) is remove the entire top piece (four bolts total) and disassemble the shock parts after that assembly is taken out. I never thought about removing the black fork from from the KW shock, as that is what it sounds like you did.

I did all the install at a DIY garage with a spring compressor as well. Times were similar. First sides took a long time, second was basically a do-from-memory affair. That goes with both front and rears, although I do agree, the rears are so much easier.

I would not be in a rush to adjust your shock heights, all the pieces will settle a good 1/4" to 3/4" inches after a week or two. And all four corners may settle differently!

MPP is certainly very fast to respond and knowledgeable. If that alone separates them from the KW suspension, which is very similar, it would be an easy choice to go with MPP.
I followed your excellent write-up as a basis for what I did, particularly making sure to remove the four bolt plate. That was the piece I struggled to get in/out because of the wheel well lining. (Not blaming you for my struggles! :) )

Good advice on the heights. I'll wait a couple weeks.
 
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I struggled to get in/out because of the wheel well lining. (Not blaming you for my struggles! :) )
I had zero issues with the wheel well lining, and now that you mentioned it, I wonder if there's a wheel well lining difference between the model years? Tesla makes a bajillion changes between the months (weeks) of production and people really don't know or find out until long after they own the car. This could be one of those changes.